The FS90R is a special servo made for continuous rotation. It can make full revolutions forward or backward, which makes it great for projects such as driving wheels on a small robot.
The FS90R servo includes an adjustment potentiometer to calibrate the middle-point (stopped) setting. Calibrate this setting by sending a 1.5ms (1500µs) pulse signal (position "90" when used with the Arduino Servo library), then slowly turn the middle-point adjustment potentiometer until the servo stops rotating. Access the middle-point adjustment potentiometer by inserting a small screwdriver into the hole in the bottom of the servo, see diagram below.
The servo's cable has a standard JR-style connector on the end.
PRODUCT CONTENTS:
- 1 — FEETECH (formerly Fitec) FS90R Continuous Rotation Servo
- 1 — straight single-ended servo horn
- 1 — straight double-ended servo horn
- 1 — winged straight double-ended servo horn
- 1 — four-pointed star servo horn
- 1 — round servo horn
- 1 — servo horn screw
- 2 — FS90R servo mounting screws
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Operating Voltage
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4.8V
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6.0V
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Stall Torque
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1.3 kg/cm
(18.09 oz/in)
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1.5 kg/cm
(20.86 oz/in)
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Max Speed
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110 RPM
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130 RPM
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Idle Current
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5 mA
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6 mA
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No Load Running Current
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100 mA
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120 mA
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Stall Current
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550 mA
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650 mA
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Operating Voltage Range
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4.8V to 6V
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Pulse Width Range
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700 to 2300 µs
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Dead Band Width
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90 µs
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Stop Signal
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1500 (±45) µs
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CW Rotation Signal Range
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700 to 1500 µs
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CCW Rotation Signal Range
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1500 to 2300 µs
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Internal Gears
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Plastic
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Cable Length
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23 cm (9.06")
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Dimensions
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Length
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32.6 mm (1.28")
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Width
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12.5 mm (0.49")
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Height
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27.3 mm (1.08")
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Weight (of servo itself)
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9 g (0.32 oz)
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Weight (including horns and screws)
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15.1 g (0.53 oz)
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